Callan Boys

The world's first lab-grown beef burger was cooked in London in 2013. The in-vitro burger was cultured from cattle stem cells. Photo: Reuters

In 15 years' time, there's a chance some of the beef you consume will have been grown in a test tube. The cow never would have had a beating heart, nor a brain, nor would it have seen a paddock or a feedlot. It would just be a bunch of cells and tissue.

Not in 100 years, not 50 years, but 15 years. Perhaps even less. Known as "cultured meat" it's just one of the ways scientists are trying to solve a very global problem. Namely: how do you feed a population that doesn't stop expanding when there's a finite amount of farmable land in the world?

Meat, particularly grain-fed beef, is also a massive contributor to global warming. Thanks to factors like methane emission, deforestation to create more grazing land and the amount of energy it takes to harvest corn and other grains for feed, the livestock industry produces more greenhouse emissions than every mode of transport on earth combined.

Seaweed has the potential to feed us, if we handle the ecosystem with care. Photo: Supplied

The bottom line is if we keep eating meat in the manner we do and don't invest in more sustainable farming solutions, the world as we know it is likely to end. This isn't hyperbole. And scientists the world over are working on some far-out solutions that are close to becoming real.

Cultured meat

If we all started eating more vegetables grown with solar power instead of fossil-fuel draining livestock, things would start to turn around for the environment in a big way. Unfortunately, experts say world meat consumption shows no sign of slowing and demand for it is expected to increase 73 per cent by 2050, even though 70 per cent of farmland is already used for livestock.

Test tube meat could be a solution to the globe's insatiable appetite for protein. In 2013, Professor Mark Post, of Maastricht University in the Netherlands, presented a burger made of cultured beef to an audience in London. Made using stem cells harvested from a cow's shoulder, the burger took three months to grow and, by all reports, tasted much like a normal burger, if a little less juicy.

Groups such as Greenpeace take a dim view of GM crops. Photo: Jason South

According to the Maastricht University's website, cells taken from just one cow could produce 175 million burgers.

"I expect cultured meat to be available in 10-15 years," says Canberra-based science writer and author Julian Cribb. "It is likely to catch on as it will be cheaper, use far fewer resources such as water, land, nutrients and pesticides, and can in theory be tailored to the precise dietary requirements of the individual. Synthetic clothing is already universal and food is likely to follow."

Cribb says cultured meat will end the reign of industrial meat by replacing it. "It will ensure the production of real meat from animals goes upmarket and farmers receive a much better price for it, as happened with wool since synthetic fibres arrived, enabling them to care for their land better," he says.

Genetically modified crops promise much, but are just one possibility. Photo: Pat Scala

As for consumers possibly not wanting to eat a cow that never went moo?

"If it's cheap, healthy and tasty, people will eat it even if they don't know how it was grown," Cribb says. "Do you really know what's in your snackfood today?"

3D Printing

3D printing works by making three-dimensional objects from digital files, layer by layer, using a variety of materials. It has been around for about a decade but only in the last couple of years has 3D food printing become a hot topic of conversation and research.

The world's first laboratory-grown beef burger was produced in 2013. Photo: Reuters

Spanish-based company Natural Machines has developed "The Foodini", a 3D food printer for both professional and home kitchens. Scheduled for mass production in the second half of 2015, the internet-connected device looks like a microwave and is essentially a tiny food manufacturing plant.

Want to make a lasagne? Fill three printing cartridges separately with meat, white sauce and pasta dough. Press a button or two and a nozzle starts pumping individual layers of each food stuff onto an oven proof tray until your lasagne reaches its required height. You still have to cook your food in the oven but the idea is that you can sit down and read a Kindle while Foodini assembles ravioli.

Imagine the possibilities. A tart in the shape of Thor's hammer? A pizza base that looks like a pirate ship? Perhaps you could even download a Nigella recipe from net, refill the cartridges with strawberries and cream and press print for panna cotta.

Soylent supposedly provides all your nutrients in one drink. Photo: William Meppem

Most 3D food printing currently uses normal, easily availble food that can fit through a nozzle and it's difficult to imagine an item like the great Foodini as anything but a novelty as a result – almost like a child playing with edible Play-Doh. However, there are more interesting things happening in the world of 3D printing at other levels.

Dr Angeline Achariya, a food innovation expert, says it may be possible to 3D-print cultured meat using similar biomedical technology to that used to print human tissue. If you want beef made in a lab to appeal to the consumer, making it look like a natural steak or hamburger is the smart way to do it.

"The remarkable thing the Japanese are investigating at the moment is how 3D printing will most likely be the only source of red meat for that market in 10 years' time," Achariya says. "You can imagine the biggest competitor to red meat going forward isn't going to be other markets, it's going to be 3D-printed products."

Natural Machines' Foodini 3D food printer is a novelty.

"I think from a technological point of view it will take a while to get it to a reasonable cost," she says. "Initially you'll have it starting at the higher-end level. I'm thinking at somewhere like a Heston Blumenthal-style restaurant where people can go in for an experience and you can watch your vegetables and meat being printed in front of you and cooked."

An important point worth considering is if production of 3D-printed food becomes an affordable reality, what will be the effect on public health? Such technology could potentially be used by supermarkets and fast food outlets to produce high-fat, high-sugar food at an even lower cost, putting a greater burden on healthcare systems around the globe. As American food journalist Mark Bittman said in Time magazine, "a 3D-printed cheeseburger is still a cheeseburger".

Soylent

But, what if you never had to worry about food again?

This is the question plastered across Soylent's website. Yep, Soylent, which I always thought was a fictitious green product consumed by Charlton Heston, made from humans and parodied for a generation on The Simpsons.

Turns out it's actually a thing. Created in 2013 by American software-engineer Rob Rhinehart, Soylent is a just-add-water powder that provides all of the essential nutrients required to fuel the human body. It can be used to replace every meal or consumed just once or twice a week.

"Aussielent" is an Australian made and packaged product similar to Soylent. A single-day pouch of the "Vegan Vanilla" variety costs $15 from its website (a seven day pack is $88) and includes the recommended daily intake of all vitamins, minerals, fibre, omega 3, omega 6 fatty acid and trace elements.

I tried it as meal replacement myself for two days. You know what? For the most part it wasn't a terrible experience. It tastes like one of those breakfast drinks that come in a tetra pack and I kind of liked not having to think about what each meal was going to be. Liquid for every meal gets a bit drab, though, and while I didn't find myself hungry, I did crave texture and food I could chew.

Products like Soylent could become common at breakfast and lunch but unless we start living in one of those utopian futures where "something isn't quite right" I doubt they will be the only form of nutrition available (even if they can fuel a body in the precisely the same way as natural, solid foods, which is up for debate).

"There is a school of thought that says food is going to be for fuel and not pleasure, but I personally don't agree with that," Achariya says. "Something like a 'meal in a pill' that contains all your necessary nutrients isn't far away, but whether the consumer moves that way is a very different question."

In a presentation titled "Conviviality for One" at Copenhagen's MAD Food Symposium in 2014, Britain-based writer and philosopher Julian Baggini said the idea behind Soylent was dubious and that humans eat for more reasons than just to feed themselves.

"A lot of the time when we eat it's about social occasion," he said. "It's about celebration, it's about sharing, it's about hospitality, it's about being together with people. It's about joy."

Personally and genetically modified food

Discussion of genetically modified (GM) foods is unavoidable when we ponder the future of food production. There has long been fierce debate about the environmental, health, political and ethical concerns of genetically altering an organism's DNA. Supporters of GM foods say they are needed to feed a growing population by potentially producing disease-resistant, higher-yielding crops with a longer shelf life.

"GM is important in developing future crops and livestock but it is far from the only technology we need," Julian Cribb says. "It is just one tool in the toolkit. So far it has not increased the world food supply at all, though this may change.

"A major disadvantage is the way it has sucked research and development funding from areas of equal or greater importance such as soil microbiology, agronomy, traditional plant breeding, plant nutrition and biological pest control. Another is its dependence on oversimplified agricultural systems such as excessive use of herbicides, which tend to fail after a time. And finally, if consumers do not trust it and see no benefits, they will reject it, whatever the chemical companies may wish."

What if food could be modified to suit a particular individual or group? That would be something certain to attract consumer interest.

"Customisation is the holy grail of any company," Achariya says. "Most people want to live longer and I think one of the big things we'll see is personalised nutrition. Creating 'food for me'. For my lifestyle. For my life stage."

On a broad scale we could see more foods engineered to have a higher amount of particular vitamin that is deficient in a local population group. At the individual level there could be 3D food printing boutiques where meat, fruit and vegetables are created to suit your needs.

"One striploin thanks, Bruce. Easy on the magnesium, hard on the calcium. Doctor's orders. A couple of chook breasts with extra folate while you're there would be tops too. Shirl's pregnant with twins, you know."

Seaweed

Urban and vertical farming are well-meaning initiatives to combat the future shortages of arable land, but here's another one: eat more seaweed. There's a lot of deep ocean out there and the slimy stuff is high in nutrients, low in calories and, when prepared correctly, tastes delicious. It also grows incredibly fast (kelp can grow up to three and a half metres in three months) and can be used to make biofuel. What's not to love about edible algae?

The ocean is a delicate place so any increases in seaweed harvesting and farming would need to be done in a sustainable manner that didn't damage the ecosystem, however if it is done correctly, the results could be spectacularly worthwhile. Biologist Ronald Osinga from Wageningen University in the Netherlands has calculated that a sea lettuce "marine garden" about twice the size of Tasmania could provide enough protein for the world's human population.

Seaweed isn't just used for making California rolls, either. It has long been used as a taste enhancer in Asian cooking to give dishes a rich and savoury tang, and the Irish have been using it for centuries to flavour soups and garnish fish.

More recently, Daniel Patterson, of San Francisco's Coi restaurant, partnered with LA food-truck pioneer Roy Choi to open a chain of restaurants called Loco'l. The chefs aim to compete with McDonald's and friends on price while also providing nutritious food made with sustainable ingredients. This is hard to do without the huge capital needed to invest in meat stocks so the Loco'l version of the Quarter Pounder is made from a mix of beef, grains, garum, white soy and seaweed. According to The Wall Street Journal, Patterson and Choi are looking to open 1 million Loco'l restaurants, so it's a good thing seaweed grows quickly.

Predicting the future is a dice-roll at the best of times and who knows what new field of science will annouce itself tomorrow and save us all. The one thing that is certain is that we must do something about how we consume and farm food, and do it in a way that appeals to the mass market. If we don't, there's going be very real food shortage and a very warm globe. And we can't all move to the mountains and start a vegie plot.